This weekend, The Cleveland Orchestra under the direction of Franz Welser-Möst present Gustav Mahler's 9th Symphony and the U.S premiere of Stromab ("Downstream") by Johannes Maria Staud. Franz sat down with Bill O'Connell prior to the performances to discuss Mahler 9, which he describes as "summing up all the emotions you can have in a lifetime." Concerts run January 11-13 at Severance Hall.